diff options
| author | Michael Pavone <pavone@retrodev.com> | 2019-02-02 23:02:19 -0800 |
|---|---|---|
| committer | Michael Pavone <pavone@retrodev.com> | 2019-02-02 23:02:19 -0800 |
| commit | 1f7eb1afff1a9b13cde11a786145ba313df3334a (patch) | |
| tree | 37fc18407ddc2af346237577c157500ce099374f /z80.cpu | |
| parent | 0d51635f43fe9a94ca1568a972c7ef6bf7afe552 (diff) | |
Implemented LDI in new Z80 core
Diffstat (limited to 'z80.cpu')
| -rw-r--r-- | z80.cpu | 44 |
1 files changed, 43 insertions, 1 deletions
@@ -2015,4 +2015,46 @@ fdcb 11BBB110 set_iyd z80_set_index B tmp fdcb 11BBBRRR set_iyd_reg - z80_set_index B main.R
\ No newline at end of file + z80_set_index B main.R + +ed 10100000 ldi + local tmp 16 + local tmp8 8 + lsl h 8 tmp + or l tmp tmp + mov tmp scratch1 + add 1 tmp tmp + mov tmp l + lsr tmp 8 h + ocall read_8 + cycles 1 + + add a scratch1 tmp8 + update_flags H0XN0 + + and 0x2 tmp8 tmp8 + lsl 4 tmp8 tmp8 + and 0x88 last_flag_result last_flag_result + or tmp8 last_flag_result last_flag_result + + lsl d 8 tmp + or e tmp tmp + mov tmp scratch2 + add 1 tmp tmp + mov tmp e + lsr tmp 8 d + ocall write_8 + + lsl b 8 tmp + or c tmp tmp + sub 1 tmp tmp + + mov tmp c + lsr tmp 8 b + mov c pvflag + or b pvflag pvflag + + + + cycles 5 +
\ No newline at end of file |